U.S. patent number 6,930,712 [Application Number 09/651,770] was granted by the patent office on 2005-08-16 for electronic camera.
This patent grant is currently assigned to Olympus Corporation. Invention is credited to Tatsuji Higuchi, Akio Terane.
United States Patent |
6,930,712 |
Higuchi , et al. |
August 16, 2005 |
Electronic camera
Abstract
An electronic camera comprises imaging means for
optoelectrically converting a subject image to generate electronic
image data, temporary storage means for temporarily storing the
image data produced by the imaging means, image display means for
displaying an image based on the image data stored in the temporary
storage means, recording means for recording the image data stored
in the temporary storage means on a recording medium, erasing means
for erasing the image data recorded on the recording medium,
instructing means for instructing the recording means to abort
recording on the recording medium of the image data stored in the
temporary storage means or for instructing the erasing means to
erase the image data recorded on the recording medium, and control
means for controlling the image display means to display thereon
the image based on the image data stored in the temporary storage
means for a predetermined period of time after capturing, for
controlling the recording means to abort recording on the recording
medium of the image data stored in the temporary storage means when
an instruction is given from the instructing means while the
recording means is recording the image data on the recording
medium, and for controlling the erasing means to erase the image
data recorded on the recording medium when an instruction is given
from the instructing means after the recording means has recorded
the image data on the recording medium.
Inventors: |
Higuchi; Tatsuji (Akiruno,
JP), Terane; Akio (Sagamihara, JP) |
Assignee: |
Olympus Corporation
(JP)
|
Family
ID: |
34830865 |
Appl.
No.: |
09/651,770 |
Filed: |
August 30, 2000 |
Foreign Application Priority Data
|
|
|
|
|
Sep 1, 1999 [JP] |
|
|
11-247856 |
Sep 1, 1999 [JP] |
|
|
11-247857 |
Sep 1, 1999 [JP] |
|
|
11-247858 |
|
Current U.S.
Class: |
348/231.99;
348/231.2; 348/333.11 |
Current CPC
Class: |
H04N
1/00925 (20130101); H04N 1/2112 (20130101); H04N
1/2137 (20130101); H04N 1/2158 (20130101); H04N
2201/218 (20130101) |
Current International
Class: |
H04N
5/225 (20060101); H04N 5/262 (20060101); H04N
005/262 () |
Field of
Search: |
;348/207.99,231.99,231.2,231.7,333.01,333.11 ;386/117,121 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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|
|
|
|
|
|
62-117883 |
|
Jul 1987 |
|
JP |
|
2-172365 |
|
Jul 1990 |
|
JP |
|
10256203 |
|
Sep 1998 |
|
JP |
|
10257370 |
|
Sep 1998 |
|
JP |
|
1127616 |
|
Jan 1999 |
|
JP |
|
11-146326 |
|
May 1999 |
|
JP |
|
11220638 |
|
Aug 1999 |
|
JP |
|
Other References
Japanese Office Action dated Apr. 16, 2002. .
Japanese Office Action mailed Dec. 2, 2003. .
English-language transaction of Japanese Office Action mailed Dec.
2, 2003..
|
Primary Examiner: Ho; Tuan
Attorney, Agent or Firm: Ostrolenk, Faber, Gerb &
Soffen, LLP
Claims
What is claimed is:
1. An electronic camera comprising: imaging means for
optoelectrically converting a subject image to generate electronic
image data; temporary storage means for temporarily storing the
image data produced by said imaging means; image display means for
displaying an image based on the image data stored in said
temporary storage means; recording means for recording the image
data stored in said temporary storage means on a recording medium;
erasing means for erasing the image data recorded on the recording
medium; instructing means for instructing said recording means to
abort recording on the recording medium of the image data stored in
said temporary storage means or for instructing said erasing means
to erase the image data recorded on the recording medium; and
control means for controlling said image display means to display
thereon the image based on the image data stored in said temporary
storage means for a predetermined period of time after capturing,
for controlling said recording means to abort recording on the
recording medium of the image data stored in said temporary storage
means when an instruction is given from said instructing means
while said recording means is recording the image data on the
recording medium, and for controlling said erasing means to erase
the image data recorded on the recording medium when an instruction
is given from said instructing means after said recording means has
recorded the image data on the recording medium.
2. An electronic camera comprising: imaging means for
optoelectrically converting a subject image to generate electronic
image data; temporary storage means for temporarily storing the
image data produced by said imaging means; recording means for
recording the image data stored in said temporary storage means on
a recording medium; erasing means for erasing the image data
recorded on the recording medium; instructing means for instructing
said recording means to abort recording on the recording medium of
the image data stored in said temporary storage means or for
instructing said erasing means to erase the image data recorded on
the recording medium; image display means for displaying an image
based on the image data; and control means operative when said
recording means is recording the image data on the recording medium
for controlling said image display means to display thereon the
image based on the image data stored in said temporary storage
means and controlling said recording means to abort recording the
image data stored in said temporary storage means on the recording
medium in response to an instruction from said instructing means,
and operative when said recording means has recorded the image data
on the recording medium for controlling said image display means to
display thereon the image based on the image data recorded on the
recording medium for a period of time provided for displaying the
image and controlling said erasing means to erase the image data
recorded on the recording medium in response to an instruction from
said instructing means.
3. An electronic camera according to claim 1 or 2, wherein said
control means controls said electronic camera to restore a
capturing enabled state after aborting the recording of the image
data stored in said temporary storage means on the recording medium
or after erasing the image data recorded on the recording
medium.
4. An electronic camera according to claim 1 or 2, further
comprising setting means for setting at least one of a display time
of the image based on the image data stored in said temporary
storage means and a display time of the image based on the image
data recorded on said recording medium, wherein said control means
controls said image display means to display thereon the image
based on the image data in accordance with the display time set by
said setting means.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is based upon and claims the benefit of priority
from the prior Japanese Patent Applications No. 11-247856, Sep. 1,
1999; No. 11-247857, Sep. 1, 1999; and No. 11-247858, Sep. 1, 1999,
the entire contents of which are incorporated herein by
reference.
BACKGROUND OF THE INVENTION
Electronic cameras (digital cameras), unlike silver salt based
cameras, feature the ability of confirming an image captured at the
site the image has just been captured. There have been proposed
electronic cameras which have a function of automatically
displaying a captured image on LCD or the like just after the image
is captured (hereinafter, referred to as the "rec-view function"),
making good use of this feature.
The rec-view function, however, is intended to automatically
display captured images. Therefore, even if it is determined from
the confirmation of a captured image through the rec-view function
that image data of the captured image need not be stored on a
recording medium such as a memory card, the image data cannot be
readily erased from the recording medium. In other words, the
photographer is involved in a sequence of tedious operations
including once switching the electronic camera to an erasure mode
and performing an erasure operation.
Also, when an attempt is made to apply the rec-view function as it
is to sequential capturing (continuous capturing) in which a
plurality of images are sequentially captured at short regular time
intervals, the electronic camera will present significantly poor
usability. Specifically, captured images are sequentially displayed
on a one-by-one basis on the screen at short time intervals
corresponding to the sequential capturing, so that the photographer
cannot sufficiently confirm the respective captured images.
Particularly, the sequential capturing may often end up with
production of images which need not be recorded on a recording
medium. If captured images are displayed in the manner mentioned
above, the photographer will experience extreme difficulties in
distinguishing images which should be recorded on a recording
medium from images which need not be recorded on the recording
medium. The difficulties further lead to difficulties in recording
only image data of images, which should be recorded, on a recording
medium.
Also, when a plurality of images are sequentially captured at short
time intervals in a normal capturing mode (hereinafter referred to
as the "quick capturing"), the photographer would suffer from an
extremely poor usability of the rec-view function, if it is applied
as it is. Specifically, captured images are sequentially displayed
on the screen on one-by-one basis at short time intervals
corresponding to the quick capturing, so that the photographer will
feel an inconvenience in the inability of sufficiently confirming
the respective captured images.
Particularly, the quick capturing may often end up with production
of images which need not be recorded on a recording medium. If
captured images are displayed in the manner mentioned above, the
photographer will experience extreme difficulties in distinguishing
images which should be recorded on a recording medium from images
which need not be recorded on the recording medium.
Further, unlike the sequential capturing, since the quick capturing
is performed in a normal capturing mode, it is indefinite from
which image to which image are handled as a set of images taken in
a quick capturing sequence, in which case difficulties arise in
handling image data for displaying and/or recording the images.
BRIEF SUMMARY OF THE INVENTION
It is a first object of the present invention to provide an
electronic camera having a rec-view function, which is capable of
readily aborting recording of image data without once setting the
electronic camera to an erasure mode, when it is determined that
the image data produced by a capture need not be recorded on a
recording medium.
It is a second object of the present invention to provide an
electronic camera having a rec-view function, which is capable of
displaying a plurality of images produced by sequential capturing
on a single multi-screen to readily distinguish images which should
be recorded (preserved) on a recording medium from images which
need not be recorded, and thereby readily recording only image data
of the images which should be recorded on the recording medium.
It is a third object of the present invention to provide an
electronic camera which offers a good usability, easy handling of
image data, and the like when a set of images are to be taken
through a quick capturing or the like.
An electronic camera according to a first aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing the image data produced by the
imaging means, image display means for displaying an image based on
the image data stored in the temporary storage means, recording
means for recording the image data stored in the temporary storage
means on a recording medium, erasing means for erasing the image
data recorded on the recording medium, instructing means for
instructing the recording means to abort recording on the recording
medium of the image data stored in the temporary storage means or
for instructing the erasing means to erase the image data recorded
on the recording medium, and control means for controlling the
image display means to display thereon the image based on the image
data stored in the temporary storage means for a predetermined
period of time after capturing, for controlling the recording means
to abort recording on the recording medium of the image data stored
in the temporary storage means when an instruction is given from
the instructing means while the recording means is recording the
image data on the recording medium, and for controlling the erasing
means to erase the image data recorded on the recording medium when
an instruction is given from the instructing means after the
recording means has recorded the image data on the recording
medium.
An electronic camera according to a second aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing the image data produced by the
imaging means, recording means for recording the image data stored
in the temporary storage means on a recording medium, erasing means
for erasing the image data recorded on the recording medium,
instructing means for instructing the recording means to abort
recording on the recording medium of the image data stored in the
temporary storage means or for instructing the erasing means to
erase the image data recorded on the recording medium, image
display means for displaying an image based on the image data, and
control means operative when the recording means is recording the
image data on the recording medium for controlling the image
display means to display thereon the image based on the image data
stored in the temporary storage means and controlling the recording
means to abort recording the image data stored in the temporary
storage means on the recording medium in response to an instruction
from the instructing means, and operative when the recording means
has recorded the image data on the recording medium for controlling
the image display means to display thereon the image based on the
image data recorded on the recording medium for a period of time
provided for displaying the image and controlling the erasing means
to erase the image data recorded on the recording medium in
response to an instruction from the instructing means.
In the first or second aspect, preferably, the control means
controls the electronic camera to restore a capturing enabled state
after aborting the recording of the image data stored in the
temporary storage means on the recording medium or after erasing
the image data recorded on the recording medium.
In the first or second aspect, preferably, the electronic camera
further comprises setting means for setting at least one of a
display time of the image based on the image data stored in the
temporary storage means and a display time of the image based on
the image data recorded on the recording medium, wherein the
control means controls the image display means to display thereon
the image based on the image data in accordance with the display
time set by the setting means.
An electronic camera according to a third aspect of the present
invention is an electronic camera capable of sequentially capturing
images, which comprises imaging means for optoelectrically
converting a subject image to produce electronic image data,
temporary storage means for temporarily storing a plurality of
image data produced by the imaging means based on sequential
capturing, recording means for recording the image data stored in
the temporary storage means on a recording medium, image display
means for displaying an image based on the image data, instructing
means for distinguishing images whose image data are to be
preserved on the recording medium from images whose image data are
not preserved on the recording medium, and control means operative
after completion of the sequential capturing for controlling the
image display means to display thereon images based on the
respective image data produced by the sequential capturing, and for
controlling the recording means not to preserve on the recording
medium the image data of images which have been distinguished as
not being preserved on the basis of an instruction from the
instructing means within the plurality of image data produced by
the sequential capturing.
An electronic camera according to a fourth aspect of the present
invention is an electronic camera capable of sequentially capturing
images, which comprises imaging means for optoelectrically
converting a subject image to produce electronic image data,
temporary storage means for temporarily storing a plurality of
image data produced by the imaging means based on sequential
capturing, recording means for recording the image data stored in
the temporary storage means on a recording medium, image display
means for displaying an image based on the image data, instructing
means for distinguishing images whose image data are to be
preserved on the recording medium from images whose image data are
not preserved on the recording medium, and control means operative
after completion of the sequential capturing for controlling the
image display means to display thereon images based on the
respective image data produced by the sequential capturing and
controlling the recording means in parallel to record the image
data produced by the sequential capturing on the recording medium,
and for controlling the recording means not to preserve on the
recording medium the image data of images which have been
distinguished as not being preserved on the basis of an instruction
from the instructing means within the plurality of image data
produced by the sequential capturing.
An electronic camera according to a fifth aspect of the present
invention is an electronic camera capable of sequentially capturing
images, which comprises imaging means for optoelectrically
converting a subject image to produce electronic image data,
temporary storage means for temporarily storing a plurality of
image data produced by the imaging means based on sequential
capturing, recording means for recording the image data stored in
the temporary storage means on a recording medium, image display
means for displaying an image based on the image data, instructing
means for distinguishing images whose image data are to be
preserved on the recording medium from images whose image data are
not preserved on the recording medium, and control means operative
after completion of the sequential capturing for controlling the
image display means to display thereon images based on the
respective image data produced by the sequential capturing,
operative after completion of the display for controlling the
recording means to record the image data produced by the sequential
capturing on the recording medium, and for controlling the
recording means not to preserve on the recording medium the image
data of images which have been distinguished as not being preserved
on the basis of an instruction from the instructing means within
the plurality of image data produced by the sequential
capturing.
In the third, fourth or fifth aspect, preferably, the image display
means displays respective images based on respective image data
produced by the sequential capturing at fixed display time
intervals, and the electronic camera further comprises display time
interval setting means for setting the time interval.
In the third, fourth or fifth aspect, preferably, the control means
controls the electronic camera to restore a capturing enabled state
after the image data has been recorded on the recording medium.
In the third, fourth or fifth aspect, preferably, the image display
means displays a plurality of images based on respective image data
produced by the sequential capturing as a collection of images
comprised of a plurality of smaller screen regions.
In the third, fourth or fifth aspect, preferably, the image display
means displays capture information during the sequential capturing
together with or independently of the images based on the image
data produced by the sequential capturing.
An electronic camera according to a sixth aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing a plurality of image data produced by
the imaging means, recording means for recording the image data
stored in the temporary storage means on a recording medium, image
display means for displaying an image based on the image data, set
capturing determining means for determining a plurality of
sequential captures as set capturing, wherein the set capturing
determining means includes start determining means for determining
the start of the set capturing, and end determining means for
determining the end of the set capturing, instructing means for
distinguishing images whose image data are to be preserved on the
recording medium from images whose image data are not preserved on
the recording medium, and control means operative after completion
of the set capturing for controlling the image display means to
display thereon an image based on each image data produced by the
set capturing, and for controlling the recording means not to
preserve on the recording medium the image data of images which
have been distinguished as not being preserved on the basis of an
instruction from the instructing means within the plurality of
image data produced by the set capturing.
An electronic camera according to a seventh aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing a plurality of image data produced by
the imaging means, recording means for recording the image data
stored in the temporary storage means on a recording medium, image
display means for displaying an image based on the image data, set
capturing determining means for determining a plurality of
sequential captures as set capturing, wherein the set capturing
determining means includes start determining means for determining
the start of the set capturing, and end determining means for
determining the end of the set capturing, instructing means for
distinguishing images whose image data are to be preserved on the
recording medium from images whose image data are not preserved on
the recording medium, and control means operative after completion
of the set capturing for controlling the image display means to
display thereon an image based on each image data produced by the
set capturing and controlling the recording means in parallel to
record the image data produced by the set capturing on the
recording medium, and for controlling the recording means not to
preserve on the recording medium the image data of images which
have been distinguished as not being preserved on the basis of an
instruction from the instructing means within the plurality of
image data produced by the set capturing.
An electronic camera according to an eighth aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing a plurality of image data produced by
the imaging means, recording means for recording the image data
stored in the temporary storage means on a recording medium, image
display means for displaying an image based on the image data, set
capturing determining means for determining a plurality of
sequential captures as set capturing, wherein the set capturing
determining means includes start determining means for determining
the start of the set capturing, and end determining means for
determining the end of the set capturing, instructing means for
distinguishing images whose image data are to be preserved on the
recording medium from images whose image data are not preserved on
the recording medium, and control means operative after completion
of the set capturing for controlling the image display means to
display thereon an image based on each image data produced by the
set capturing, operative after completion of the display for
controlling the recording means to record the image data produced
by the set capturing on the recording medium, and for controlling
the recording means not to preserve on the recording medium the
image data of images which have been distinguished as not being
preserved on the basis of an instruction from the instructing means
within the plurality of image data produced by the set
capturing.
In the sixth, seventh or eighth aspect, preferably, the start
determining means determines, when the capturing is instructed, the
start of the set capturing when the number of image frames
corresponding to image data which have not been recorded on the
recording medium is equal to or more than a predetermined number
within a plurality of image data stored in the temporary storage
means.
In the sixth, seventh or eighth aspect, preferably, the start
determining means determines the start of the set capturing when a
next capture is started before image data produced by a capture has
not been recorded on the recording medium.
In the sixth, seventh or eighth aspect, preferably, the start
determining means determines the start of the set capturing when a
capturing time interval is within a predetermined time. In this
case, preferably, the electronic camera further comprises changing
means for changing the predetermined time.
In the sixth, seventh or eighth aspect, preferably, the start
determining means determines the start of the set capturing when a
photographer instructs the start through a manipulation.
In the sixth, seventh or eighth aspect, preferably, the end
determining means determines the end of the set capturing when a
capturing time interval is equal to or longer than a predetermined
time. In this case, preferably, the electronic camera further
comprises changing means for changing the predetermined time.
In the sixth, seventh or eighth aspect, preferably, the end
determining means determines the end of the set capturing when a
photographer instructs the end through a manipulation.
In the sixth, seventh or eighth aspect, preferably, the image
display means displays the respective images based on the
respective image data produced by the set capturing at fixed
display time intervals, and the electronic camera further comprises
display time interval setting means for setting the time
interval.
In the sixth, seventh or eighth aspect, preferably, the image
display means displays the respective images based on the
respective image data produced by the set capturing at fixed
display time intervals in a capturing order, and displays a next
image when an instruction is given from the instructing means even
before the fixed display time does not expire.
In the sixth, seventh or eighth aspect, preferably, the control
means controls the electronic camera to restore a capturing enabled
state after the image data has been recorded on the recording
medium.
In the sixth, seventh or eighth aspect, preferably, the image
display means displays a plurality of images based on the
respective image data produced by the set capturing as a collection
of images comprised of a plurality of smaller screen regions.
In the sixth, seventh or eighth aspect, preferably, the electronic
camera further comprises set capturing display means for displaying
that the set capturing is in progress.
In the sixth, seventh or eighth aspect, preferably, the image
display means displays capture information during the set capturing
together with or independently of the images based on the image
data produced by the set capturing.
In the sixth, seventh or eighth aspect, preferably, the recording
means additionally records information indicating that the image
data to be recorded on the recording medium are image data captured
by the set capturing, when the recording means records the image
data captured by the set capturing on the recording medium.
In the sixth, seventh or eighth aspect, preferably, the image
display means displays an image in an enlarged view.
An electronic camera according to a ninth aspect of the present
invention comprises imaging means for optoelectrically converting a
subject image to generate electronic image data, temporary storage
means for temporarily storing a plurality of image data produced by
the imaging means, recording means for recording the image data
stored in the temporary storage means on a recording medium, image
display means for displaying images based on the image data,
capture instructing means for instructing a capture, set capturing
indicating means for indicating a plurality of sequential captures
as set capturing, and set capturing determining means for
determining images captured in response to an instruction of the
capture instructing means while the set capturing indicting means
is being manipulated, as images in the set capturing.
Additional objects and advantages of the invention will be set
forth in the description which follows, and in part will be obvious
from the description, or may be learned by practice of the
invention. The objects and advantages of the invention may be
realized and obtained by means of the instrumentalities and
combinations particularly pointed out hereinafter.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
The accompanying drawings, which are incorporated in and constitute
a part of the specification, illustrate presently preferred
embodiments of the invention, and together with the general
description given above and the detailed description of the
preferred embodiments given below, serve to explain the principles
of the invention.
FIG. 1 is a block diagram illustrating an exemplary configuration
of a system according to Embodiment 1 of the present invention;
FIG. 2 is a flow chart illustrating an exemplary operation in a
capturing mode in Embodiment 1 of the present invention;
FIG. 3 is a flow chart illustrating an exemplary operation in the
capturing mode in Embodiment 1 of the present invention;
FIG. 4 is a flow chart illustrating an exemplary operation of card
recording processing illustrated in FIG. 2;
FIG. 5 is a flow chart illustrating an exemplary operation of
summary display processing illustrated in FIG. 2;
FIG. 6 is a flow chart illustrating an exemplary operation of a
normal display processing illustrated in FIG. 3;
FIG. 7 is a flow chart illustrating an exemplary operation in a
reproduction mode in Embodiment 1 of the present invention;
FIG. 8 is a block diagram illustrating an exemplary configuration
of a system according to Embodiment 2 of the present invention;
FIG. 9 is a flow chart illustrating an exemplary operation of
Embodiment 2 of the present invention;
FIG. 10 is a flow chart illustrating an exemplary operation
performed when a display/recording mode 1 is selected in Embodiment
2 of the present invention;
FIG. 11 is a flow chart illustrating an exemplary operation
performed when a display/recording mode 2 is selected in Embodiment
2 of the present invention;
FIG. 12 is a flow chart illustrating an exemplary operation
performed when a display/recording mode 3 is selected in Embodiment
2 of the present invention;
FIG. 13 is a flow chart illustrating an exemplary operation
performed when a display/recording mode 4 is selected in Embodiment
2 of the present invention;
FIG. 14 is a flow chart illustrating an exemplary operation
performed when a display/recording mode 5 is selected in Embodiment
2 of the present invention;
FIG. 15 is an explanatory diagram illustrating an exemplary
multi-screen display when the display/recording mode 2 or the
display/recording mode 4 is selected in Embodiment 2 and Embodiment
3 of the present invention;
FIGS. 16A to 16C are explanatory diagrams illustrating an example
of how capture information is displayed during sequential capturing
or during a set capture in Embodiment 2 and Embodiment 3 of the
present invention;
FIG. 17 is an explanatory diagram illustrating another example of
how capture information is displayed during sequential capturing or
during set capturing in Embodiment 2 and Embodiment 3 of the
present invention;
FIGS. 18A to 18C are explanatory diagrams illustrating another
example of how capture information is displayed during sequential
capturing or during set capturing in Embodiment 2 and Embodiment 3
of the present invention;
FIG. 19 is a block diagram illustrating an exemplary configuration
of a system according to Embodiment 3 of the present invention;
FIG. 20 is a flow chart illustrating an exemplary operation of
Embodiment 3A of the present invention;
FIGS. 21A and 21B are diagrams showing how to determine that set
capturing is started in Embodiment 3A of the present invention;
FIGS. 22A and 22B are diagrams showing how to determine that the
set capturing is terminated in Embodiment 3A of the present
invention;
FIG. 23 is a diagram schematically showing how to determine that
the set capturing is started and terminated in Embodiment 3A of the
present invention;
FIG. 24 is a flow chart illustrating an exemplary operation when a
display/recording mode 1 is selected in Embodiment 3A of the
present invention;
FIG. 25 is a flow chart illustrating an exemplary operation when a
display/recording mode 2 is selected in Embodiment 3A of the
present invention;
FIG. 26 is a flow chart illustrating an exemplary operation when a
display/recording mode 3 is selected in Embodiment 3A of the
present invention;
FIG. 27 is a flow chart illustrating an exemplary operation when a
display/recording mode 4 is selected in Embodiment 3A of the
present invention;
FIG. 28 is a flow chart illustrating an exemplary operation when a
display/recording mode 5 is selected in Embodiment 3A of the
present invention;
FIG. 29 is a flow chart illustrating an exemplary operation of
Embodiment 3B of the present invention;
FIGS. 30A and 30B show how to determine that set capturing is
started in Embodiment 3B of the present invention;
FIG. 31 is a diagram schematically showing how to determine when
the set capturing is started and terminated in Embodiment 3B of the
present invention;
FIG. 32 is a flow chart illustrating an exemplary operation of
Embodiment 3C of the present invention; and
FIG. 33 is a diagram showing an exemplary switching operation for
performing set capturing in Embodiment 3C of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
Embodiment 1 of the present invention will hereinafter be described
with reference to the accompanying drawings. FIG. 1 is a block
diagram illustrating an exemplary configuration of an electronic
camera according to Embodiment 1.
An imaging unit basically has a similar configuration to that of an
ordinary electronic camera, and comprises a lens 11; an imager
device 12 comprised of an optoelectronic converting device such as
CCD; an imager circuit 13; and an A/D converter circuit 14. More
specifically, an object focused by the lens 11 is optoelectrically
converted by the imager device 12, and an optoelectrically
converted image signal is supplied to the A/D converter circuit 14
through the imager circuit 13 to produce a digitally converted
image signal.
A system controller 15, which is responsible for controlling
respective units of the electronic camera, has an image processing
function for performing white balance processing, matrix
operations, and the like, and a compression/decompression function
for compressing and decompressing image data (image
information).
A buffer memory 16 temporarily stores image data and the like,
produced by the imaging unit. The buffer memory 16 is also used as
a work area for image processing such as the white balance
processing. Further, the buffer memory 16 is used as a work area
for image data compression/decompression processing, thin-out
processing performed for displaying an image, and the like.
A memory interface 17 is an interface for transmitting and
receiving information to and from a removable recording medium
(memory card) 19 which is inserted into a card slot of a
recording/erasure unit 18. Through the memory interface 17, image
information is written into the recording medium 19; image
information is read from the recording medium 19; and image
information recorded on the recording medium 19 is erased.
A video memory 20 holds display data. Display data held in the
video memory 20 is sent to a video converter circuit 21 which
performs predetermined processing on the display data for
displaying an image on an image display LCD 22. The image display
LCD 22 is adapted to provide a summary display (a simple display)
based on simple image processing in which a .gamma. conversion is
approximated by a linear line, by way of example, for the rec-view.
An output signal from the video converter circuit 21 is sent to an
external device through a video out terminal 23.
An external interface 24 is an interface for communicating with an
external device through an external input/output terminal 25. This
external interface 24 allows for transmission and reception of a
variety of information such as image information to and from an
external device such as a personal computer.
A manipulation unit 26, which allows the photographer to give a
variety of instructions to the electronic camera, comprises a
release switch 26a1; a mode selection switch 26b1 for selecting a
variety of modes; a rec-view selection switch 26c1 for previously
selecting whether or not the rec-view function is used; a display
selection switch 26d1 for previously selecting only a summary
display or a combination of a summary display with a normal display
when the rec-view function is used; a cancel switch 26e1 for
aborting recording of image data into a memory card or instructing
erasure of image data recorded on the memory card; a display time
setting switch 26f1 for setting a display time (summary display
time, normal display time) in the rec-view; and the like. It should
be noted that a normal display uses image data which has been
gamma-converted (in software), for example, with a regular curve
and recorded on the memory card and displays a reproduced image
from such image data. Therefore, the normal display provides a
higher image quality than a summary display.
A mode display LCD 27 displays a variety of modes, while a strobe
light emitter 28 emits strobe light when an image is captured with
the aid of the strobe light.
A power supply 29 supplies electric power to respective components
of the electronic camera, and a battery 30 is connected to the
power supply 29. The power supply 29 can also be connected to an
external power supply through an external power supply terminal
31.
Next, an exemplary operation of Embodiment 1 will be described with
reference to flow charts illustrated in FIGS. 2 to 7.
First, as illustrated in FIG. 2, the following description will
center on a routine executed when a capturing mode is selected
through the mode selection switch 26b1 on the manipulation unit 26
illustrated in FIG. 1 (S1001).
It is first determined whether or not a change is required for a
summary display time T1 in the rec-view and a normal display time
T2 (S1002). When the change is required, the summary display time
T1 and the normal display time T2 are changed through the display
time setting switch 26f1 (S1003). When the summary display time T1
and the normal display time T2 are not changed, T1 is set to
approximately three seconds; and T2 to approximately five seconds,
by way of example, by default.
As the release switch 26a1 is depressed (S1004), predetermined
capture processing is performed. Specifically, an image signal
optoelectrically converted by the imager device 12 is input to the
A/D converter circuit 14 through the imager circuit 13, and image
data is output from the A/D converter circuit 14 (S1005). This
image data is stored in the buffer memory 16 (S1006).
Subsequently, it is determined whether or not the rec-view function
is used on the image display LCD 22. Whether or not the rec-view
function is used has been previously selected through the rec-view
selection switch 26c1 (S1007).
When the rec-view function is not used, card recording processing
is performed (S1008). This card recording processing is performed
as illustrated in a flow chart of FIG. 4. Specifically, image data
stored in the buffer memory 16 undergoes image processing such as
white balance processing, matrix operations, and the like (S1101),
the processed image data is compressed in accordance with the JPEG
scheme (S1102), and the compressed image data is recorded on the
memory card (recording medium 19) through the memory interface 17
(S1103). In this way, the recording on the memory card is completed
(S1009).
When the rec-view function is used, card recording processing
(S1010) and summary display processing (S1011) are performed
temporally in parallel. The card recording processing (S1010) is
performed as illustrated in the flow chart of FIG. 4.
The summary display processing (S1011) is performed as illustrated
in the flow chart of FIG. 5. First, certain image data stored in
the buffer memory 16 is thinned out, so that image data produced in
the imaging unit is converted to image data having a less number of
data than the original image data. This thinning is performed
because the number of display pixels on the image display LCD 22 is
smaller than the number of pixels on the imager device 12 (S1111).
The thinned image data is stored in the video memory 20 (S1112),
and undergoes predetermined video processing in the video converter
circuit 21 (S1113). A summary display image is displayed on the
image display LCD 22 based on the signal resulting from the video
processing (S1114). In this way, image data produced in the imaging
unit undergoes only simple image processing without compression
processing, processing involved in recording on the memory card,
and the like, to display a summary image on the image display LCD
22, thereby allowing the photographer to immediately confirm a
captured image.
As the cancel switch 26e1 is depressed before the recording on the
memory card is completed (S1012), the recording on the memory card
is aborted (S1013), and the routine again returns to step S1002. As
the recording processing on the memory card is completed (S1014),
recording termination processing follows (S1015).
When the cancel switch 26e1 is depressed after the recording on the
memory card has been performed (S1016), image data recorded on the
memory card is erased (S1017), followed by the routine again
returning to step S1002. The summary display time T1 is set to be
equal to or longer than a time generally required to record image
data on the memory card. Therefore, when the cancel switch 26e1 is
depressed after image data has been recorded on the memory card,
the image data once recorded on the memory card is erased. When the
cancel switch 26e1 is not depressed within the summary display time
T1 (S1018), the summary display is terminated (S1019).
In this way, a captured image is confirmed as a summary display
image on the image display LCD 22 and is determined by the
photographer as an image not required for storage on the memory
card, the photographer may depress the cancel switch 26e1 within
the summary display period to readily abort recording of the image
data on the memory card or erase image data recorded on the memory
card. Thus, even while image data is being recorded on the memory
card, or even after image data has been recorded on the memory
card, the image data is not eventually recorded on the memory card
if it is determined not to be recorded. It is therefore possible to
eliminate useless recording on the memory card.
Next, it is determined whether or not the normal display is
subsequently performed after the summary display is terminated
(S1020). Whether or not the normal display is performed has been
previously selected through the display selection switch 26d1. As
mentioned above, since the summary display image is an image before
it undergoes regular image processing, it does not always provide a
satisfactory image quality from a viewpoint of the fidelity to an
actually captured image. For this reason, the normal display can
also be performed for a higher image quality subsequent to the
summary display.
The routine returns to step 1002 when the normal display is not
performed, while the processing involved in the normal display is
performed as illustrated in FIG. 3 when the normal display is
performed (step S1021).
The routine for the normal display (S1021) is executed as
illustrated in the flow chart of FIG. 6. First, image data recorded
on the memory card (recording medium 19) through the card recording
processing (S1010) is read from the memory card (S1121). The read
image data is stored in the buffer memory 16 (S1122), and undergoes
decompression in accordance with the JPEG scheme (S1123). The
decompressed image data is thinned out as appropriate (S1124),
stored in the video memory 20 (S1125), and further undergoes
predetermined video processing in the video converter circuit 21
(S1126). Consequently, an image is displayed on the image display
LCD 22 in the normal display mode based on the signal resulting
from the video processing (S1127). By thus displaying the image in
the normal display mode subsequent to the summary display, the
photographer can confirm the captured image through the high
quality image.
When the cancel switch 26e1 is depressed before the normal display
is terminated, i.e., within the normal display time T2 (S1022), the
image data once recorded on the memory card is erased (step S1023),
followed by the routine again returning to step S1002. Likewise,
when the release switch 26a1 is depressed before the normal display
is terminated (S1024), the routine returns to step S1002. When the
cancel switch 26e1 is not depressed within the normal display time
T2 (S1025), the normal display is terminated (S1026), followed by
the routine returning to step S1002.
In this way, since an image of a higher image quality can be viewed
in the normal display mode, the necessity of recording image data
on the memory card can be determined without fail even when the
summary display cannot permit the photographer to determine the
necessity. Then, when image data need not be recorded on the memory
card, the cancel switch 26e1 may be depressed to readily erase the
image data recorded on the memory card. It is therefore possible to
eliminate useless recording on the memory card.
Next, as illustrated in FIG. 7, the following description will
center on a routine executed when a reproduction mode is selected
(S1051) through the mode selection switch 26b1 on the manipulation
unit 26 illustrated in FIG. 1.
First, image data stored on the memory card (recording medium 19)
is read from the memory card (S1052). The read image data is stored
in the buffer memory 16 (S1053), decompressed in accordance with
the JPEG scheme (S1054), and thinned out as appropriate (S1055).
The thinned image data is stored in the video memory 20 (S1056),
and further undergoes predetermined video processing in the video
converter circuit 21 (S1057). An image is then displayed on the
image display LCD 22 based on the signal resulting from the video
processing (S1058). When the photographer wants to display another
image (frame) (S1059), the photographer specifies such a desired
frame, followed by repetitions of the foregoing steps S1052 to
S1058.
According to Embodiment 1, even during or after recording image
data on a recording medium, it is possible to eventually to avoid
recording unnecessary image data on the recording medium, and
therefore readily prevent useless recording without fail.
[Embodiment 2]
In the following, Embodiment 2 of the present invention will be
described with reference to the accompanying drawings. FIG. 8 is a
block diagram illustrating an exemplary configuration of an
electronic camera according to Embodiment 2.
An imaging unit basically has a similar configuration to that of an
ordinary electronic camera, and comprises a lens 11; an imager
device 12 comprised of an optoelectronic converting device such as
CCD; an imager circuit 13; and an A/D converter circuit 14. More
specifically, an object focused by the lens 11 is optoelectrically
converted by the imager device 12, and an optoelectrically
converted image signal is supplied to the A/D converter circuit 14
through the imager circuit 13 to produce a digitally converted
image signal.
A system controller 15, which is responsible for controlling
respective units of the electronic camera, has an image processing
function for performing .gamma. conversion, white balance
processing, matrix operations, and the like, and a
compression/decompression function for compressing and
decompressing image data.
A buffer memory (DRAM) 16 temporarily stores image data (image
information) and the like, produced by the imaging unit, and stores
a sequence of image data resulting from sequential capturing when
it is performed. The buffer memory 16 is also used as a work area
for image processing such as the white balance processing. Further,
the buffer memory 16 is used as a work area for image data
compression/decompression processing, thin-out processing performed
for displaying an image, and the like.
A memory interface 17 is an interface for transmitting and
receiving information to and from a removable recording medium
(memory card) 19 which is inserted into a card slot of a
recording/erasure unit 18. Through the memory interface 17, image
information is written into the recording medium 19; image
information is read from the recording medium 19; and image
information recorded on the recording medium 19 is erased.
A video memory (VRAM) 20 holds display data. Display data held in
the video memory 20 is sent to a video converter circuit 21 which
performs predetermined processing on the display data for
displaying an image on an image display LCD 22. The image display
LCD 22 is adapted to provide a summary display (simple display),
based on image processing (.gamma. conversion and the like) simpler
than that for a normal display, or a multi-screen display (a
multi-picture display) for the rec-view, other than the normal
display. An output signal from the video converter circuit 21 is
sent to an external device through a video out terminal 23.
An external interface 24 is an interface for communicating with an
external device through an external input/output terminal 25. This
external interface 24 allows for transmission and reception of a
variety of information such as image information to and from an
external device such as a personal computer.
A manipulation unit 26, which allows the photographer to give a
variety of instructions to the electronic camera, comprises a
release switch 26a2; a capturing mode selection switch 26b2 for
selecting a variety of capturing modes (normal capturing mode,
sequential capturing mode, and the like); a display/recording mode
selection switch 26c2 for previously selecting a variety of modes
in the rec-view and card recording after the completion of a
sequential capture; an unnecessary image selection switch (cancel
switch) 26d2 for selecting an image whose image data need not be
recorded (preserved) on the memory card after the completion of the
sequential capturing; a display time interval setting switch 26e2
for setting a time interval for sequentially displaying a sequence
of images produced by the sequential capturing in the rec-view
after the completion of the sequential capturing; a cross key 26f2
for performing a desired selection on the screen; and the like. It
should be noted that a required image selection switch may be
provided for selecting an image whose image data need be recorded
on the memory card in place of the cancel switch (unnecessary image
selection switch) 26d2.
A mode display LCD 27 displays a variety of modes, while a strobe
light emitter 28 emits strobe light when an image is captured with
the aid of the strobe light.
A power supply 29 supplies electric power to respective components
of the electronic camera, and a battery 30 is connected to the
power supply 29. The power supply 29 can also be connected to an
external power supply through an external power supply terminal
31.
Next, an exemplary operation of Embodiment 2 will be described with
reference to flow charts illustrated in FIGS. 9 to 14.
In the flow chart of FIG. 9, assume that the sequential capturing
mode has been previously selected through the capturing mode
selection switch 26b2 on the manipulation unit 26 (S2010). As the
release switch 26a2 is turned on (S2011), predetermined capture
processing is performed. Specifically, an image signal
optoelectrically converted by the imager device 12 is input to the
A/D converter circuit 14 through the imager circuit 13, and image
data is output from the A/D converter circuit 14 (S2012). This
image data is stored in the buffer memory 16 (S2013). In this way,
images are sequentially captured at predetermined time intervals
(the sequential capturing is performed) until the release switch
26a2 is turned off, and each image data produced in each capture is
stored in the buffer memory 16 (S2014).
The completion of the sequential capturing is followed by advance
to a routine associated with a display/recording mode previously
selected from the five possible modes 1-5 through the
display/recording mode selection switch 26c2 on the manipulation
unit 26 (S2015-S2019).
First, the following description will center on a routine executed
when the display/recording mode 1 has been selected with reference
to the flow chart of FIG. 10. In this display/recording mode 1
(S2100), after the sequential capturing is completed, display
(rec-view) processing and card recording processing are performed
temporally in parallel.
Summary display processing (S2101) displays an image which
undergoes simpler image processing (.gamma. conversion or the like)
than a normal display. Specifically, image data representative of
captured images stored in the buffer memory 16 undergoes summary
image processing, and summary display images are displayed on the
image display LCD 22 based on the processed image data.
Respective images (frames) captured by the sequential capturing are
displayed sequentially on the image display LCD 22 at predetermined
time intervals (in this embodiment, assume that the time interval
(t0) is set to one second (t0=1)). This time interval is variable,
and is previously set through the display time interval setting
switch 26e2 (S2104, S2106). A photographer may view images
displayed on the image display LCD 22 to determine images whose
image data should be recorded (preserved) on the memory card
(recording medium 19) and images whose image data should not be
recorded thereon. An image which should not be recorded on the
memory card, i.e., an unnecessary frames may be specified by
depressing the cancel switch 26d2 while the image is being
displayed on the image display LCD 22 (S2102, S2103). It should be
noted that when the cancel switch 26d2 is depressed, the display
proceeds to the next frame before the lapse of the display time
(t0=1 second), so that a waiting time until the next frame is
displayed can be omitted.
When the last frame captured by the sequential capturing has been
displayed in the foregoing manner (S2105), the summary display is
terminated (S2107).
Alternatively, after the last frame has been displayed, all the
images may be cyclically displayed sequentially from the first
frame. Additionally, for displaying each image, an image processing
function of the system controller 15 may be used to zoom up so as
to enlarge the displayed image at a predetermined magnification.
The enlarged display allows the photographer to readily confirm the
focus or the like.
In the card recording processing (S2111), image data recorded on
the buffer memory 16 undergoes predetermined image processing (for
example, a regular .gamma. conversion instead of simplified .gamma.
conversion), and compression in accordance with the JPEG scheme.
The compressed image data is recorded on the memory card (recording
medium 19) through the memory interface 17.
Image data of respective images (frames) produced by the sequential
capturing are sequentially recorded on the memory card (S2115). In
this event, for recording image data of the respective images on
the memory card, when image data of some frames have been marked as
recording not required in the summary display processing (S2112),
the image data of such frames are prevented from being recorded on
the memory card (S2113). In this way, image data are sequentially
processed until the last frame (S2114).
Since the summary display processing and the card recording
processing are performed independently of each other and in
parallel with each other, a frame, which has been recorded on the
memory card, may be designated as an unnecessary frame after it has
been recorded. Also, an unnecessary frame may be indicated after
the last frame has been processed. For these reasons, after the
last frame has been processed, it is again determined whether or
not a certain frame has been designated as an unnecessary frame,
and subsequently, the determination as to whether or not any frame
has been designated as an unnecessary frame is continued until the
summary display is completed (S2116). For frames marked as
unnecessary frames, image data of these frames, which have once
been recorded on the memory card, are erased, so that the image
data of the frames are not eventually recorded (preserved) on the
memory card (S2117). As the summary display period expires (S2118),
the card recording processing is completed (S2119), followed by the
routine proceeding again to a capturing enabled state (step S2011
in FIG. 9).
Additionally, for recording image data on the memory card,
identification information may be recorded in combination with the
image data for indicating that the image data to be recorded are
image data which have been produced by the sequential capturing.
Specifically, information indicative of the sequential capturing
may be recorded in a header field in a file of each image data. By
thus recording the identification information in combination, it is
possible to collectively process the image data produced by the
sequential capturing.
Next, the following description will center on a routine executed
when the display/recording mode 2 has been selected with reference
to the flow chart of FIG. 11. Likewise, in this display/recording
mode 2 (S2200), after the sequential capturing is completed, the
display (rec-view) processing and the card recording processing are
performed temporally in parallel.
Multi-screen display processing (S2201) reduces the size of a
plurality of images captured by sequential capturing and displays
the images in a reduced size on a single screen as a collection of
images, i.e., a multi-screen display. Specifically, image data
stored in the buffer memory 16 undergoes the processing required
for the multi-screen display, and for example, as illustrated in
FIG. 15, a plurality of frames of images captured by the sequential
capturing are provided on the image display LCD 22 as the
multi-screen display.
The photographer may view the multi-screen display on the image
display LCD 22 to determine images which should be recorded on the
memory card (recording medium 19) and images which should not be
recorded. An image which should not be recorded on the memory card,
i.e., an unnecessary frame may be selected using the cross key 26f2
or the like. In the example of FIG. 15, a mark "E" is displayed in
a lower left region of an image selected from the respective images
(labeled sequential capturing frame numbers SE1-SE5) captured by
the sequential capturing (S2202). By thus selecting an unnecessary
frame on the screen and then depressing the cancel switch 26d2, the
unnecessary frame can be designated (S2203, S2204). The designation
of an unnecessary frame can be accepted as long as the multiple
images are being displayed on the screen (S2205). As the display
period expires, the multi-screen display is terminated (S2206).
Operations at respective steps (S2211-S2219) in the card recording
processing are similar to those at the corresponding steps
(S2111-S2119) in the display/recording mode 1 illustrated in FIG.
10. Specifically, image data of respective frames captured by
sequential capturing are sequentially recorded on the memory card.
However, for those frames which have been designated as recording
not required during the summary display processing, the recording
of the image data on the memory card is aborted, or the image data
once recorded on the memory card is erased.
In this way, since captured images are displayed after the
completion of the sequential capturing in the display/recording
modes 1 and 2, unnecessary images can be readily confirmed.
Particularly, the display/recording mode 1 is advantageous in
providing a wider display area for one image, which facilitates the
viewing, since every image is displayed over the entire screen
through the summary display. The display/recording mode 2 in turn
is advantageous in facilitating a comparison among respective
images since these images produced by the sequential capturing are
simultaneously displayed through the multi-screen display.
Also, since the display/recording modes 1 and 2 can terminate the
card recording processing in a shorter period of time since the
display processing and the card recording processing are performed
temporally in parallel. Further, unnecessary images may be
selectively designated during the display period to readily abort
recording of image data on the memory card or erase image data once
recorded on the memory card, thereby making it possible to avoid
useless recording of such unnecessary images on the memory
card.
Next, the following description will center on a routine executed
when the display/recording mode 3 has been selected with reference
to the flow chart of FIG. 12. In this display/recording mode 3
(S2300), the display (rec-view) processing is performed after
sequential capturing is completed, and the card recording
processing is performed after the display processing.
Operations at respective steps (S2301-S2307) in the summary display
processing are similar to those at the corresponding steps
(S2101-S2107) in the display/recording mode 1 illustrated in FIG.
10. Specifically, respective images (frames) captured by sequential
capturing are sequentially displayed on the image display LCD 22 at
predetermined time intervals, and the cancel switch 26d2 is
depressed to designate an unnecessary frame while the image is
being displayed on the image display LCD 22.
Likewise, operations at S2311 to S2315 involved in the card
recording processing are similar to those at the corresponding
steps S2111-S2115 illustrated in FIG. 10. However, in the
display/recording mode 3, since the card recording processing is
performed after the summary display processing is completed,
unnecessary frames have already been designated (S2302, S2303) at
the time the card recording processing is started. For this reason,
steps S2116 to S2118 illustrated in FIG. 10 are omitted. Therefore,
in the display/recording mode 3, the processing completed for the
last frame results in the termination of the recording of image
data on the memory card (S2316).
Next, the following description will center on a routine executed
when the display/recording mode 4 has been selected with reference
to the flow chart of FIG. 13. Likewise, in this display/recording
mode 4 (S2400), the display (rec-view) processing is performed
after sequential capturing is completed, and the card recording
processing is performed after the display processing. Also, in the
display processing, images are viewed in a multi-screen
display.
Operations at respective steps (S2401-S2406) in the multi-screen
display processing are similar to those at the corresponding steps
(S2201-S2206) of the display/recording mode 2 illustrated in FIG.
11. Specifically, any unnecessary frame is selected on the
multi-image screen, and the cancel switch 26d2 is then depressed to
designate the unnecessary frame.
Likewise, operations at steps S2411 to S2415 in the card recording
processing are similar to those at the corresponding steps S2211 to
S2215 illustrated in FIG. 11. However, in the display/recording
mode 4, since the card recording processing is performed after the
multi-screen display processing is completed, the steps S2216 to
52218 illustrated in FIG. 11 are omitted, the processing completed
for the last frame results in the termination of the recording of
image data on the memory card (S2416).
As described above, in the display/recording modes 3 and 4, since
captured images are displayed after the sequential capturing is
completed, unnecessary images can be readily determined as is the
case of the display/recording modes 1 and 2.
Next, the following description will center on a routine executed
when the display/recording mode 5 has been selected with reference
to the flow chart of FIG. 14.
In this display/recording mode 5 (S2500), no image is displayed, so
that the card recording processing is immediately entered after
sequential capturing is completed (S2501). As image data of
respective images captured by the sequential capture are recorded
on the memory card, the card recording is completed (S2502),
followed by the routine proceeding again to a capturing enabled
state (step S2011 in FIG. 9).
In the examples described above, while images captured by the
sequential capturing are displayed on the image display LCD 22,
capture information during the sequential capturing may be
displayed in combination with or independently of the images
captured by the sequential capturing. In the following, description
will be made on some examples in which such capture information is
displayed with reference to FIGS. 16 to 18.
In examples illustrated in FIGS. 16A to 16C, luminance information
on each of images captured by sequential capturing (three images in
this example) is displayed on the image display LCD 22.
FIG. 16A to FIG. 16C show luminance distributions for respective
images captured by the sequential capturing. The horizontal axis
represents the luminance of pixels included in a measuring area of
AE, while the vertical axis represents the frequency of occurrence
of each luminance. The measuring area may be the entire screen.
When sequential capturing is performed with exposure conditions
intentionally varied to only record the one which exhibits the best
result on the memory card, a sufficient evaluation may not be made
only by displaying images. However, a correct evaluation can be
made by displaying the luminance information as shown in this
example.
Another example shown in FIG. 17 displays a variety of capture
information on each of images captured by the sequential capturing
(three images in this example) represented by numerical values on
the. image display LCD 22.
A line "recording memory" displays the capacity of memory required
for recording each of the images (NO1-NO3) on the memory card. A
line "AF" displays numerical values representative of AF evaluation
amounts for each capture (100 is a maximum value, and the focus is
more accurate as the value is larger). A line "AE" displays a
shutter speed and an aperture value for each capture. A line "GV"
displays the amount of strobe light emission for each capture, when
strobe light is used for the capture, converted to a guide
number.
For example, when sequential capturing is performed with the focus
intentionally varied to record only the one which exhibits the best
result on the memory card, a sufficient evaluation may not be made
only by displaying images. However, a correct evaluation can be
made by displaying the numerical information as shown in this
example.
A further example illustrated in FIGS. 18A to 18C displays a
focused area in each of images captured by the sequential capturing
(three images in this example) on the image display LCD 22 in an
identifiable manner.
For example, a portion of an image having a spatial frequency equal
to or higher than a fixed value is determined to be in focus, and
this portion is displayed in an identifiable manner. This can be
implemented using such methods as displaying only a focused area in
a special color or in half tone, and the like. The examples
illustrated in FIGS. 18A to 18C show (A) a person on the left side,
standing behind, is focused; (B) a person in a central portion,
standing in front, is focused; and (C) either of persons is not
focused. The focused areas are displayed with an emphasized red
component.
By thus displaying the capture information during the sequential
capturing on the screen, a correct evaluation can be accomplished
even when the evaluation is difficult with a captured image. It is
therefore possible to readily select those images which need be
recorded on the memory card or those images which need not be
recorded on the memory card.
According to Embodiment 2, since captured images are displayed
after the sequential capturing is completed, it is possible to
readily distinguish images which need be recorded (preserved) on a
recording medium from images which need not be recorded, with the
result that image data of the images which need be recorded on the
recording medium can only be recorded readily on the recording
medium.
[Embodiment 3]
In the following, Embodiment 3 of the present invention will be
described with reference to the accompanying drawings.
(Embodiment 3A) FIG. 19 is a block diagram illustrating an
exemplary configuration of an electronic camera according to
Embodiment 3A.
An imaging unit basically has a similar configuration to that of an
ordinary electronic camera, and comprises a lens 11; an imager
device 12 comprised of an optoelectronic converting device such as
CCD; an imager circuit 13; and an A/D converter circuit 14. More
specifically, an object focused by the lens 11 is optoelectrically
converted by the imager device 12, and an optoelectrically
converted image signal is supplied to the A/D converter circuit 14
through the imager circuit 13 to produce a digitally converted
image signal.
A system controller 15, which is responsible for controlling
respective units of the electronic camera, has an image processing
function for performing .gamma. conversion, white balance
processing, matrix operations, and the like, and a
compression/decompression function for compressing and
decompressing image data (image information). The system controller
also has determining functions for determining whether a sequence
of continuous captures by quick capturing or the like (set
capturing) is regarded as set capturing (a set capturing start
determining function and a set capturing end determining
function).
A buffer memory (DRAM) 16 temporarily stores image data and the
like, produced by the imaging unit, and stores a sequence of image
data resulting from set capturing when it is performed. The buffer
memory 16 is also used as a work area for image processing such as
the white balance processing. Further, the buffer memory 16 is.
used as a work area for image data compression/decompression
processing, thin-out processing performed for displaying an image,
and the like.
A memory interface 17 is an interface for transmitting and
receiving information to and from a removable recording medium
(memory card) 19 which is inserted into a card slot of a
recording/erasure unit 18. Through the memory interface 17, image
information is written into the recording medium 19; image
information is read from the recording medium 19; and image
information recorded on the recording medium 19 is erased.
A video memory (VRAM) 20 holds display data. Display data held in
the video memory 20 is sent to a video converter circuit 21 which
performs predetermined processing on the display data for
displaying an image on an image display LCD 22. The image display
LCD 22 is adapted to provide a summary display, which involves
image processing (.gamma. conversion and the like) simpler than
that for a normal display, or a multi-screen display for the
rec-view, other than the normal display. An output signal from the
video converter circuit 21 is sent to an external device through a
video out terminal 23.
An external interface 24 is an interface for communicating with an
external device through an external input/output terminal 25. This
external interface 24 allows for transmission and reception of a
variety of information such as image information to and from an
external device such as a personal computer.
A manipulation unit 26, which allows the photographer to give a
variety of instructions to the electronic camera, comprises a
release switch 26a3; a capturing mode selection switch 26b3 for
selecting a variety of capturing modes (normal capturing mode,
sequential capturing mode, and the like); a display/recording mode
selection switch 26c3 for previously selecting a variety of modes
in the rec-view and card recording after the completion of
capturing; an unnecessary image selection switch (cancel switch)
26d3 for selecting an image whose image data need not be recorded
(preserved) on the memory card after the completion of the
capturing; display time interval setting switch 26e3 for setting a
time interval for sequentially displaying a sequence of images
captured by set capturing in the rec-view after the completion of
the capturing; a time setting switch 26f3 for setting a time when
the start or end of the set capturing is determined by a time
interval of release manipulations or the like; a mark-off switch
26g3 for use in determining the start or end of the set capturing
through an indication entered by the photographer (hereinafter
referred to as the "mark off entry"); a cross key 26h3 for
performing a desired selection on the screen; and the like. It
should be noted that a required image selection switch may be
provided for selecting an image whose image data need be recorded
on the memory card in place of the cancel switch (unnecessary image
selection switch) 26d3.
A mode display LCD 27 displays a variety of modes, while a strobe
light emitter 28 emits strobe light when an image is captured with
the aid of the strobe light. An LED display 32 indicates the set
capturing in progress.
A power supply 29 supplies electric power to respective components
of the electronic camera, and a battery 30 is connected to the
power supply 29. The power supply 29 can also be connected to an
external power supply through an external power supply terminal
31.
Next, an exemplary operation of Embodiment 3A will be described
with reference to flow charts illustrated in FIG. 20 and the
like.
In the flow chart of FIG. 20, assume that a desired capturing mode
has been selected through the capturing mode selection switch 26b3
on the manipulation unit 26 (S3010). First, a capturing mode is
identified (S3011), and when a sequential capturing mode is
identified, predetermined sequential capturing processing is
performed (S3012).
For a normal capturing mode (S3013), it is determined whether or
not set capturing is started (S3014, S3015). If it is determined
that no set capturing is performed, normal capturing processing is
performed (S3016). Also, even if the set capturing is determined, a
failure in manipulating the release switch for a fixed period of
time T (for example one minute) or more (S3017, S3018) results in
forcedly resetting of the set capturing, followed by the routine
proceeding to the normal capturing processing (S3016).
In the set capturing, each time the release switch 26a3 is
depressed, predetermined imaging processing is performed (S3019) to
sequentially store image data produced by respective captures in
the buffer memory (S3020). A period of the set capturing continues
until it is determined that the set capturing is completed (S3022)
by determining the end of the set capturing (S3021). Also, during
the set capturing period, the LED display 32 indicates that the set
capturing is in progress.
Here, the set capturing start determination and end determination
will be described with reference to FIGS. 21 and 22.
The set capturing start determination may be made as shown in FIG.
21A or 21B. In an example of FIG. 21A, the start of the set
capturing is determined when a release interval, i.e., a time
interval of sequential captures is within a predetermined time
interval t1, and it is determined that the set capturing has been
started from the preceding capture. In an example of FIG. 21B, the
start of set capturing is determined when the photographer
instructs the start through an associated manipulation. The
manipulation for instructing the start involves depressing the
mark-off switch 26g3, and it is determined that the set capturing
is started from a capture after the manipulation for instructing
the start.
The set capturing end determination may be made as shown in FIG.
22A or 22B. In an example of FIG. 22A, the end of the set capturing
is determined when the release switch has not been depressed for a
predetermined period of time t2 or longer. In an example of FIG.
22B, the end of the set capturing is determined when the
photographer instructs the end through an associated manipulation.
The manipulation for instructing the end involves depressing the
mark-off switch 26g3.
In the examples of FIGS. 21A and 22A, the set time interval t1 and
the set period of time t2 are variable, and they can be previously
set through the time setting switch 26f3 or the like. Specifically,
t1, t2 can be set in the following manner. As the time setting
switch 26f3 is depressed to enter a time setting mode, candidates
for the set time interval t1 (for example one second, two seconds,
five seconds) and candidates for the set period of time t2 (for
example, two seconds, five seconds, ten seconds) are displayed on
the image display LCD 22. These set time interval t1 and set period
of time t2 can be selected through the cross key 26h3, and
established by depressing the release switch 26a3 after desired
values are selected through the cross key 26h3. The time setting
mode is cleared by again depressing the time setting switch 26f3.
Default values are set at two seconds for the set time interval t1
(t1=2) and at five seconds for the set period of time t2
(t2=5).
FIG. 23 shows an example of the foregoing start and end
determinations, wherein the start is determined with the method of
FIG. 21A and the end is determined with the method of FIG. 22B. In
FIG. 23, r1-r6 indicate manipulations on the release switch 26a3,
respectively. Since a time interval between r1 and r2 is longer
than t1, the start of set capturing is not determined. On the other
hand, since a time interval between r3 and r4 is shorter than t1,
the start of set capturing is determined at the time of r4, so that
the processing proceeds on the assumption that the set capturing
has been started from the time r3. In this example, once the set
capturing is started, a set capturing period continues even if a
release interval is longer than ti, and the set capturing period is
terminated by the photographer depressing the mark-off switch
26g3.
In the flow chart of FIG. 20, as the set capturing is terminated
(S3022), the flow proceeds to a routine associated with a
display/recording mode previously selected from the five possible
modes 1-5 through the display/recording mode selection switch 26c3
on the manipulation unit 26 (53023).
First, the following description will center on a routine executed
when the display/recording mode 1 has been selected with reference
to a flow chart of FIG. 24. In this display/recording mode 1
(S3100), after the sequential capturing is completed, display
(rec-view) processing and card recording processing are performed
temporally in parallel.
Summary display processing (S3101) displays an image which
undergoes simpler image processing (.gamma. conversion or the like)
than a normal display. Specifically, image data representative of
captured images stored in the buffer memory 16 undergoes summary
image processing, and summary display images are displayed on the
image display LCD 22 based on the processed image data.
Respective images (frames) captured by the set capturing are
displayed sequentially on the image display LCD 22 at predetermined
time intervals (in this embodiment, assume that the time interval
(t0) is one second (t0=1)). This time interval is variable, and is
previously set through the display time interval setting switch
26e3 (S3104, S3106). A photographer may view images displayed on
the image display LCD 22 to determine images whose image data
should be recorded (preserved) on the memory card (recording medium
19) and images whose image data should not be recorded thereon. The
images which should not be recorded on the memory card, i.e.,
unnecessary frames may be specified by depressing the cancel switch
26d3 while the image are being displayed on the image display LCD
22 (S3102, S3103). It should be noted that when the cancel switch
26d3 is depressed, the display proceeds to the next frame before
the lapse of the display time (t0=1 second), so that a waiting time
until the next frame is displayed can be omitted.
When the last frame captured by the set capturing has been
displayed in the foregoing manner (S3105), the summary display is
terminated (S3107).
Alternatively, after the last frame has been displayed, all the
images may be cyclically displayed sequentially from the first
frame. Additionally, for displaying each image, an image processing
function of the system controller 15 may be used to zoom up and
enlarge the displayed image at a predetermined magnification. The
enlarged display allows the photographer to facilitate the
confirmation of the focus or the like.
In the card recording processing (S3111), image data recorded on
the buffer memory 16 undergoes predetermined image processing (for
example, a regular .gamma. conversion instead of simplified .gamma.
conversion), and compression in accordance with the JPEG scheme.
The compressed image data is recorded on the memory card (recording
medium 19) through the memory interface 17.
Image data of respective images (frames) produced by the set
capturing are sequentially recorded on the memory card (S3115). In
this event, for recording image data of the respective images on
the memory card, when image data of some frames have been marked as
recording not required in the summary display processing (S3112),
the image data of such frames are prevented from being recorded on
the memory card (S3113). In this way, image data are sequentially
processed until the last frame (S3114).
Since the summary display processing and the card recording
processing are performed independently of each other and in
parallel with each other, a frame, which has been recorded on the
memory card, may be designated as an unnecessary frame after it has
been recorded. Also, unnecessary frame may be indicated after the
last frame has been processed. For these reasons, after the last
frame has been processed, it is again determined whether or not a
certain frame has been designated as an unnecessary frame, and
subsequently, the determination as to whether or not any frame has
been designated as an unnecessary frame is continued until the
summary display is completed (S3116). For frames marked as
unnecessary frames, image data of these frames, which have once
been recorded on the memory card, are erased, so that the image
data of the frames are not eventually recorded (preserved) on the
memory card (S3117). As the summary display period expires (S3118),
the card recording processing is completed (S3119), followed by the
routine proceeding again to a capturing enabled state (step S3014
in FIG. 20).
Additionally, for recording image data on the memory card,
identification information may be recorded in combination with the
image data for indicating that the image data to be recorded are
image data which have been produced by set capturing. Specifically,
information indicative of the set capturing may be recorded in a
header field in a file of each image data. By thus recording the
identification information in combination, it is possible to
collectively process the image data produced by the set
capturing.
Next, the following description will center on a routine executed
when the display/recording mode 2 has been selected with reference
to the flow chart of FIG. 25. Likewise, in this display/recording
mode 2 (S3200), after the set capturing is completed, the display
(rec-view) processing and the card recording processing are
performed temporally in parallel.
Multi-screen display processing (S3201) reduces the size of a
plurality of images captured by set capturing and displays the
images in a reduced size on a single screen as a collection of
images, i.e., a multi-screen display. Specifically, image data
stored in the buffer memory 16 undergoes the processing required
for the multi-screen display, and for example, as illustrated in
FIG. 15, a plurality of images captured by the set capturing are
provided on the image display LCD 22 as the multi-screen
display.
The photographer may view the multi-screen display on the image
display LCD 22 to determine images which should be recorded on the
memory card (recording medium 19) and images which should not be
recorded. An image which should not be recorded on the memory card,
i.e., an unnecessary frame, may be selected using the cross key
26h3 or the like. In the example of FIG. 15, a mark "E" is
displayed in a lower left region of an image selected from the
respective images (labeled set capturing frame numbers SE1-SE5)
captured by the set capturing (S3202). By thus selecting an
unnecessary frame on the screen and then depressing the cancel
switch 26d3, the unnecessary frame can be designated (S3203,
S3204). The designation of an unnecessary frame can be accepted as
long as the multiple images are being displayed on the screen
(S3205). As the display period expires, the multi-screen display is
terminated (S3206).
Operations at respective steps (S3211-S3219) in the card recording
processing are similar to those at the corresponding steps
(S3111-S3119) in the display/recording mode 1 illustrated in FIG.
24. Specifically, image data of respective frames captured by set
capturing are sequentially recorded on the memory card. However,
for those frames which have been designated as recording not
required during the summary display processing, the recording of
the image data on the memory card is aborted, or the image data
once recorded on the memory card is erased.
In this way, since captured images are displayed after the
completion of the set capturing in the display/recording modes 1
and 2, unnecessary images can be readily confirmed. Particularly,
the display/recording mode 1 is advantageous in providing a wider
display area for one image, which facilitates the viewing, since
every image is displayed over the entire screen through the summary
display. The display/recording mode 2 in turn is advantageous in
facilitating a comparison among respective images since these
images produced by set capturing are simultaneously displayed
through the multi-screen display.
Also, since the display/recording modes 1 and 2 can terminate the
card recording processing in a shorter period of time since the
display processing and the card recording processing are performed
temporally in parallel. Further, unnecessary images may be
selectively designated during the display period to readily abort
recording of image data on the memory card or erase image data once
recorded on the memory card, thereby making it possible to avoid
useless recording of such unnecessary images on the memory
card.
Next, the following description will center on a routine executed
when the display/recording mode 3 has been selected with reference
to the flow chart of FIG. 26. In this display/recording mode 3
(S3300), the display (rec-view) processing is performed after
sequential capturing is completed, and the card recording
processing is performed after the display processing.
Operations at respective steps (S3301-S3307) in the summary display
processing are similar to those at the corresponding steps
(S3101-S3107) in the display/recording mode 1 illustrated in FIG.
24. Specifically, respective images (frames) captured by set
capturing are sequentially displayed on the image display LCD 22 at
predetermined time intervals, and the cancel switch 26d3 is
depressed to designate an unnecessary frame while the image is
being displayed on the image display LCD 22.
Likewise, operations at S3311 to S3315 involved in the card
recording processing are similar to those at the corresponding
steps S3111-S3115 illustrated in FIG. 24. However, in the
display/recording mode 3, since the card recording processing is
performed after the summary display processing is competed,
unnecessary frames have already been designated (S3302, S3303) at
the time the card recording processing is started. For this reason,
steps S3116 to S3118 illustrated in FIG. 24 are omitted. Therefore,
in the display/recording mode 3, the processing completed for the
last frame results in the termination of the recording of image
data on the memory card (S3316).
Next, the following description will center on a routine executed
when the display/recording mode 4 has been selected with reference
to the flow chart of FIG. 27. Likewise, in this display/recording
mode 4 (S3400), the display (rec-view) processing is performed
after set capturing is completed, and the card recording processing
is performed after the display processing. Also, in the display
processing, images are viewed in a multi-screen display.
Operations at respective steps (S3401-S3406) in the multi-screen
display processing are similar to those at the corresponding steps
(S3201-S3206) of the display/recording mode 2 illustrated in FIG.
25. Specifically, any unnecessary frame is selected on the
multi-image screen, and the cancel switch 26d3 is then depressed to
designate the unnecessary frame.
Likewise, operations at steps S3411 to S3415 in the card recording
processing are similar to those at the corresponding steps S3211 to
S3215 illustrated in FIG. 25. However, in the display/recording
mode 4, since the card recording processing is performed after the
multi-screen display processing is completed, the steps S3216 to
S3218 illustrated in FIG. 25 are omitted, the processing completed
for the last frame results in the termination of the recording of
image data on the memory card (S3416).
As described above, in the display/recording modes 3 and 4, since
captured images are displayed after the set capturing is completed,
unnecessary images can be readily determined as is the case of the
display/recording modes 1 and 2.
Next, the following description will center on a routine executed
when the display/recording mode 5 has been selected with reference
to the flow chart of FIG. 28.
In this display/recording mode 5 (S3500), no image is displayed, so
that the card recording processing is immediately entered after set
capturing is completed (S3501). As image data of respective images
captured by the set capture are recorded on the memory card, the
card recording is completed (S3502), followed by the routine
proceeding again to a capturing enabled state (step S3014 in FIG.
20).
(Embodiment 3B)
Next, Embodiment 3B will be described with reference to a flow
chart of FIG. 29 and the like. It should be noted that the
configuration of the electronic camera is similar to that
illustrated in FIG. 19 which has been described in Embodiment
3A.
In the flow chart of FIG. 29, assume that a desired capturing mode
has been selected through the capturing mode selection switch 26b3
(S3600). First, a capturing mode is identified (S3601), and when a
sequential capturing mode is identified, predetermined sequential
capturing processing is performed (S3602).
In a normal capturing mode (S3603), as the release switch 26a3 is
depressed (S3604), predetermined capturing processing is performed
(S3605), and image data produced by the capturing is stored in the
buffer memory 16 (S3606). Subsequently, it is determined whether or
not set capturing is started (S3607, S3608). If it is determined
that no set capturing is performed, normal capturing processing is
performed (S3609), and image data of captured images are recorded
on the memory card (S3610).
Here, the set capturing start determination will be described with
reference to FIGS. 30A, 30B. In an example of FIG. 30A, the start
of the set capturing is determined when the number of image frames
which have not been recorded on the memory card within image data
stored in the buffer memory is equal to or more than a
predetermined number, and it is determined that the set capturing
has been started from the preceding capture. In an example of FIG.
30B, the start of set capturing is determined when the next capture
is started before an image captured immediately previous thereto
has not been recorded on the memory card, and it is determined that
the set capturing has been started from the preceding capture.
When it is determined that set capturing is started (S3608), image
data stored in the buffer memory is recorded on the memory card
(S3614), and the capturing processing and the storage of the image
data in the buffer memory are repeated (S3612, S3613) until it is
determined that the set capturing is terminated (S3615, S3616). For
determining that the set capturing is terminated, the method of
FIG. 22A or 22B, previously described in Embodiment 3A, may be
applied.
FIG. 31 shows an example of the foregoing start and end
determinations, wherein the start is determined with the method of
FIG. 30B and the end is determined with the method of FIG. 22B. For
example, since processing P1 (each processing such as .gamma.
conversion, color conversion and compression, recording on the
memory card, and the like. A processing time required for one frame
depends on an image quality mode and the like) performed after a
manipulation r1 on the release switch has been completed before a
manipulation r2 on the release switch, the start of the set
capturing is not determined at the time of the manipulation r2 on
the release switch. On the other hand, since processing P3
performed after a manipulation r3 on the release switch has not
been completed at the time of a manipulation r4 on the release
switch, the start of the set capturing is determined at the time of
the manipulation r4 on the release switch, so that the processing
proceeds on the assumption that the set capturing has been started
from the time r3. Once the set capturing is started, a set
capturing period continues even if the preceding frame has been
processed at the time the release switch is manipulated, and the
set capturing period is terminated by the photographer depressing
the mark-off switch 26g3.
In the flow chart of FIG. 29, as the set capturing is terminated
(S3616), the flow proceeds to the display processing. Respective
images (frames) captured by the set capturing are displayed
sequentially on the image display LCD 22 at predetermined time
intervals (for example at intervals of one second) (S3617). A
photographer may view images displayed on the image display LCD 22
to determine images whose image data should be recorded (preserved)
on the memory card (recording medium 19) and images whose image
data should not be recorded thereon. The images which should not be
recorded on the memory card, i.e., unnecessary frames may be
specified by depressing the cancel switch 26d3 while the image are
being displayed on the image display LCD 22.
For frames marked as unnecessary frames, image data of these
frames, once recorded on the memory card are erased, so that the
image data of the frames are not eventually recorded (preserved) on
the memory card (S3618, S3619). The processing is repeated
sequentially until the last frame in this way (S3620, S3621),
followed by the termination of the display of images captured by
the set capturing and the erasure of unnecessary frames
(S3622).
While in the foregoing embodiment, the respective images captured
by the set capturing are sequentially displayed on the image
display LCD 22 at predetermined time intervals, the respective
images captured by the set capturing may be displayed
simultaneously on the image display LCD 22 using the multi-screen
display previously described in Embodiment 3A.
(Embodiment 3C)
Next, Embodiment 3C will be described with reference to a flow
chart of FIG. 32. It should be noted that the configuration of the
electronic camera is similar to that illustrated in FIG. 19 which
has been described in Embodiment 3A.
In the flow chart of FIG. 32, assume that a desired capturing mode
has been selected through the capturing mode selection switch 26b3
(S3700). First, a capturing mode is identified (S3701), and when a
sequential capturing mode is identified, predetermined sequential
capturing processing is performed (S3702).
In a normal capturing mode (S3703), it is determined whether the
flow proceeds to a set capturing mode (S3704, S3705). When the flow
does not proceed to the set capturing, normal capturing processing
is performed (S3706). The transition to the set capturing mode can
be carried out by double clicking the capturing mode selection
switch 26b3, as shown in a timing chart of FIG. 33.
After the transition to the set capturing mode (S3707), the
capturing mode selection switch is depressed to start a set
capturing period (S3708). As shown in FIG. 33, when the release
switch 26a3 is depressed with the capturing mode selection switch
26b3 held down (S3709), the predetermined capturing processing is
performed (S3710) to store image data produced by the capturing is
stored in the buffer memory 16 (S3711). In this way, the set
capturing period continues as long as the capturing mode selection
switch 26b3 is kept depressed, and the set capturing is performed
each time the release switch 26a3 is depressed within the
period.
As the capturing mode selection switch 26b3 is released from the
depressed state (S3712), the set capturing period is terminated
(S3713), and the flow proceeds to a routine associated with a
display/recording mode previously selected from the five possible
modes 1-5 through the display/recording mode selection switch 26c3
(S3714). The respective routines associated with the
display/recording modes 1-5 are similar to those previously
described in Embodiment 3A.
As described above, in this embodiment, since the set capturing is
performed only while the capturing mode selection switch 26b3 is
kept depressed, the photographer can capture images while
distinguishing without fail the set capturing from the normal
capturing.
In the examples described above, while images captured by the set
capturing are displayed on the image display LCD 22, capture
information during the set capturing may be displayed in
combination with or independently of the images captured by the set
capturing. In the following, description will be made on examples
in which such capture information is displayed with reference to
FIGS. 16 to 18.
An example illustrated in FIGS. 16A to 16C displays luminance
information on each of images captured by set capturing (three
images in this example) on the image display LCD 22.
FIG. 16A to FIG. 16C show luminance distributions for respective
images captured by the set capturing. The horizontal axis
represents the luminance of pixels included in a measuring area of
AE, while the vertical axis represents the frequency of occurrence
of each luminance. The measuring area may be the entire screen.
When set capturing is performed with exposure conditions
intentionally varied to only record the one which exhibits the best
result on the memory card, a sufficient evaluation may not be made
only by displaying images. However, a correct evaluation can be
made by displaying the luminance information as is done in this
example.
Another example shown in FIG. 17 displays a variety of capture
information on each of images captured by set capturing (three
images in this example) represented by numerical values on the
image display LCD 22.
A line "recording memory" display the capacity of memory required
for recording each of the images (NO1-NO3) on the memory card. A
line "AF" displays numerical values representative of AF evaluation
amounts for each capture (100 is a maximum value, and the focus is
more accurate as the value is larger). A line "AE" displays a
shutter speed and an aperture value for each capture. A line "GV"
displays the amount of strobe light emission for each capture, when
strobe light is used for the capture, converted to a guide
number.
For example, when set capturing is performed with the focus
intentionally varied to record only the one which exhibits the best
result on the memory card, a sufficient evaluation may not be made
only by displaying images. However, a correct evaluation can be
made by displaying the numerical information as is done in this
example.
A further example illustrated in FIGS. 18A to 18C displays a
focused area in each of images captured by set capturing (three
images in this example) on the image display LCD 22 in an
identifiable manner.
For example, a portion of an image having a spatial frequency equal
to or higher than a fixed value is determined to be in focus, and
this portion is displayed in an identifiable manner. This can be
implemented using such methods as displaying only a focused area in
a special color or in half tone, and the like. The examples
illustrated in FIGS. 18A to 18C show (A) a person on the left side,
standing behind, is focused; (B) a person in a central portion,
standing in front, is focused; and (C) either of persons is not
focused. The focused areas are displayed with an emphasized red
component.
By thus displaying the capture information during the set capturing
on the screen, a correct evaluation can be accomplished even when
the evaluation is difficult with a captured image. It is therefore
possible to readily select those images which need be recorded on
the memory card or those images which need not be recorded on the
memory card.
According to Embodiment 3, it is possible to provide an electronic
camera which improves the usability, handling of image data, and
the like, with the ability of readily distinguishing images which
need be recorded (preserved) on a recording medium from images
which need not be recorded, and the like when the set capturing is
performed.
As described above, the present invention provides an electronic
camera having a rec-view function which is capable of performing a
summary image display, a multi-screen display, or an image property
(corresponding to the capture information) display in parallel with
recording of captured images on a memory card. These displays can
be relied on to readily identify frames which need not be recorded
on the memory card and to promptly abort a recording operation for
frames which need not be recorded during the recording of captured
images on the memory card. It will therefore be appreciated that
the electronic camera according to the present invention can
prevent useless recording of images on the memory card, reduce a
capturing interval, and effectively utilize a recording region on
the memory card.
Additional advantages and modifications will readily occur to those
skilled in the art. Therefore, the invention in its broader aspects
is not limited to the specific details and representative
embodiments shown and described herein. Accordingly, various
modifications may be made without departing from the spirit or
scope of the general inventive concept as defined by the appended
claims and their equivalents.
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